The only problem with the +Mention method of private messaging here on G+, there is no true message history showing all of your private +Mentions. I've haven't seen anyone mention this little trick since the first week here on G+. I thought I'd share this helpful tip again.

Private Message Tracker / History

Create a Circle, name it whatever you want. I named mine Private Msgs. Important: Don't add anyone to your newly created Circle. Now, whenever you send a private message to someone, just +Mention them as normal, this time include your Private Messaging Circle as well. Then, when viewing your Stream, select your Private Messaging Circle and you'll see a history of every +Mention private message you've ever sent.

Had a business meeting offsite at the Timbermine. I didn't know what to expect, but I was pleasantly surprised.
Location: Awesome. Tucked back int the trees near the mountains. You couldn't ask for a better location near natural beauty.
Food: I had turkey steak, wild rice, corn, and rolls. All of it was tasty.
Venue: Big. And I mean HUGE. But there's a reason it's still packed every night. Multiple rooms with different themes, antiques, and more--great place for family dining.

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Had a business meeting offsite at the Timbermine. I didn't know what to expect, but I was pleasantly surprised.
Location: Awesome. Tucked back int the trees near the mountains. You couldn't ask for a better location near natural beauty.
Food: I had turkey steak, wild rice, corn, and rolls. All of it was tasty.
Venue: Big. And I mean HUGE. But there's a reason it's still packed every night. Multiple rooms with different themes, antiques, and more--great place for family dining.